Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46848745621d65b…

MALICIOUS

PDF

32.5 KB Created: 2020-08-16 12:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9c2f488036d422828e5c565f4b32228 SHA-1: 81d1e7220673b4e3f641f2a3bb614380a32d0f14 SHA-256: e46848745621d65b3d8d2340c23d12b03075c002602e6e4e9b0cdf928ac5b3d0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link disguised as a movie download, which redirects to a known malicious domain. The heuristic firings confirm this is a malicious redirector and a link farm, indicating a likely attempt to distribute malware or phish for credentials. The document body, though heavily obfuscated, contains the malicious URL and appears to be generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=rupinder+gandhi+2+full+movie+free
    • http://xivav.juneberrycottage.com/uploads/1/3/0/7/130738970/f24530ce87477f.pdf
    • http://files.humanmovements.com/uploads/1/3/1/0/131070051/2dfad43.pdf
    • http://mesibu.novaleeskulls.com/uploads/1/3/1/0/131070146/3506035.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4027/files/84846871513.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/74058566625.pdf
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/applied_anatomy_and_biomechanics_in_sport_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/medicine_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xeniwepisovera.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/82215379494.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/ignou_solved_assignment_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/4788/4699/files/bakadebowulegekuxefabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8290/files/jugikapuxelifamirezota.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/1004/files/gejeledatuvijonixor.pdf
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/vazadon.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/mepevuv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043eb.bin
78427b708c0b9268bc0b90ae6113609587bee11c3ec0cfd1bf79acea3ae355ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43EB 5476 bytes
font_01_sfnt_off00005669.bin
34638b19bf0ac0b0cf8929116edf42fe03b3961491060d71e563a9521b063924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5669 9068 bytes

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